Equivalent Models and Identification of Performance Parameters for Primary Frequency Regulation of a TPP Unit

In view of the problem that the existing primary frequency regulation evaluation method cannot accurately reflect the transient regulation process of the thermal power plant (TPP) unit after the disturbance, the primary frequency regulation control performance evaluation method based on the equivalent model is proposed. Combining with the existing low-order primary frequency regulation model, the proportional-inertia equivalent link is added. The parameter identification approach of proportional and inertia time constants of this equivalent link and the analytical expression of the benchmark power of primary frequency regulation control performance evaluation based on the equivalent model are given. The analysis results show that, compared with the existing static evaluation methods, the proportional and inertia time constants can reflect the transient characteristics of the primary frequency regulation of the thermal unit, and the primary frequency regulation benchmark power based on the equivalent model is more consistent with the theoretical primary frequency regulation process.